ParallelEnumerable.Single<TSource> Method (ParallelQuery<TSource>)
Returns the only element of a parallel sequence, and throws an exception if there is not exactly one element in the sequence.
Assembly: System.Core (in System.Core.dll)
The sequence to return the single element of.
The single element of the input sequence.
The type of the elements of source.
The query was canceled with the token passed in through WithCancellation.
source is a null reference (Nothing in Visual Basic).
One or more exceptions occurred during the evaluation of the query.
The input sequence contains more than one element. -or- The input sequence is empty.
Available since 4.5
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Available since 8.1